Emissions from the flaring began on Monday and were ongoing on Tuesday.

The event may have sparked spot market buying, traders said.

Chicago unleaded gasoline traded at a discount of 8.5 cents/gal to gasoline futures, compared with 13.5 cents/gal under gasoline futures on Monday. The absolute spot price increased by 12.25 cents/gal for a range of $2.4775-$2.4800/gal.

ConocoPhillips’ media relations did not immediately respond with a comment.